package com.gdue.config;

import com.alibaba.fastjson.support.spring.messaging.MappingFastJsonMessageConverter;
import com.gdue.commons.JacksonObjectMapper;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import org.springframework.web.servlet.view.json.MappingJackson2JsonView;

import java.util.List;

/**
 * webMVC配置类
 */
@Configuration
public class WebMvcConfilg  extends WebMvcConfigurationSupport {

    /**
     *  设置静态资源映射路径
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * 扩展mvc框架的消息转换器
     *  避免响应的消息存在精度缺失和格式不符问题
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter=new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将java对象转换成json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将消息转换器追加到mvc框架的转换器集合中
        converters.add(0,messageConverter);
    }
}
